push Keyword

The push keyword is used to push STREAMS modules
onto the stream designated by fd.
See the doconfig(3NSL)
man page.

push module1[, module2, module3, ...]

module1 is the name of the first module to
be pushed, module2 is the name of the second module
to be pushed, and so on. The command fails if any of the named modules cannot
be pushed. If a module cannot be pushed, the subsequent modules on the same
command line are ignored and modules that have already been pushed are popped.